2812 CAN通讯无法进入中断

只看该作者 · 2014-4-30 20:51

本帖最后由 yjw16 于 2014-4-30 22:13 编辑

ECAN作为发送邮箱时，电脑上可以成功收到数据。但作为接受邮箱时，老是不能进入中断，请问是什么原因？程序如下
void main(void)
{
      InitSysCtrl();
      DINT;
      IER = 0x0000;
      IFR = 0x0000;
      InitPieCtrl();
      InitPieVectTable();
      InitECan();
      EALLOW;
      PieVectTable.ECAN0INTA  =  &User_ECAN0_INTA;
      //PieVectTable.ECAN1INTA  =  &User_ECAN1_INTA;
EDIS;
      PieCtrl.PIEIER1.bit.INTx5=1;
      IER |= M_INT9;
      EINT;
ERTM;
      Rec_l=0;
      Rec_h=0;
for(;;)
{}
}

interrupt void User_ECAN0_INTA(void)
{

      while(ECanaRegs.CANRMP.all!=0x00010000);
      ECanaRegs.CANRMP.all!=0x00010000;

      Rec_l=ECanaMboxes.MBOX16.MDRL.all;
      Rec_h=ECanaMboxes.MBOX16.MDRH.all;
      PieCtrl.PIEACK.bit.ACK9 = 1;
      EINT;
}

void InitECan(void)
{
      struct ECAN_REGS ECanaShadow;
      EALLOW;
GpioMuxRegs.GPFMUX.bit.CANTXA_GPIOF6 = 1;
GpioMuxRegs.GPFMUX.bit.CANRXA_GPIOF7 = 1;
      EDIS;

      EALLOW;
      ECanaShadow.CANTIOC.all = ECanaRegs.CANTIOC.all;
      ECanaShadow.CANTIOC.bit.TXFUNC = 1;
      ECanaRegs.CANTIOC.all = ECanaShadow.CANRIOC.all;

      ECanaShadow.CANRIOC.all = ECanaRegs.CANRIOC.all;
      ECanaShadow.CANRIOC.bit.RXFUNC = 1;
      ECanaRegs.CANRIOC.all = ECanaShadow.CANRIOC.all;
      EDIS;

      EALLOW;
      ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
      ECanaShadow.CANMC.bit.STM = 0;
      ECanaShadow.CANMC.bit.SCM = 1;
      ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
      EDIS;

      ECanaMboxes.MBOX16.MCF.all=0x00000000;
      ECanaRegs.CANTA.all=0xFFFFFFFF;
      ECanaRegs.CANRMP.all=0xFFFFFFFF;

      ECanaRegs.CANGIF0.all = 0xFFFFFFFF;
      ECanaRegs.CANGIF1.all = 0xFFFFFFFF;

            EALLOW;
      //邮箱屏蔽使能
      ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
      ECanaShadow.CANMC.bit.CCR = 1;
      ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
      EDIS;

            do
      {
      ECanaShadow.CANES.all = ECanaRegs.CANES.all;
      }while(ECanaShadow.CANES.bit.CCE != 1);

            // 125kHz CAN clock
      EALLOW;
      ECanaShadow.CANBTC.bit.BRP = 79; //9
      ECanaShadow.CANBTC.bit.TSEG2 = 2; //5
      ECanaShadow.CANBTC.bit.TSEG1 = 10; //7
      ECanaRegs.CANBTC.all = ECanaShadow.CANBTC.all;

      ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
      ECanaShadow.CANMC.bit.CCR = 0;
      ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
      EDIS;

      do
      {
            ECanaShadow.CANES.all = ECanaRegs.CANES.all;
      }while(ECanaShadow.CANES.bit.CCE != 0);
      ECanaRegs.CANME.all=0;
      ECanaMboxes.MBOX16.MID.all = 0x80C20000;
      ECanaShadow.CANMD.all = ECanaRegs.CANMD.all;
      ECanaShadow.CANMD.bit.MD16 = 1;
      ECanaRegs.CANMD.all = ECanaShadow.CANMD.all;
      ECanaMboxes.MBOX16.MCF.bit.DLC = 8;

            ECanaMboxes.MBOX16.MCF.bit.RTR = 0;

            ECanaShadow.CANME.all = ECanaRegs.CANME.all;
            ECanaShadow.CANME.bit.ME16=1;
            ECanaRegs.CANME.all = ECanaShadow.CANME.all;

            EALLOW;
            ECanaRegs.CANMIM.all = 0xFFFFFFFF;
            ECanaRegs.CANMIL.all =0;
            ECanaRegs.CANGIF0.all = 0xFFFFFFFF;
            ECanaRegs.CANGIM.bit.I0EN = 1;
            EDIS;
}